摘要
研究块状花生壳对Cd2+和Pb2+的吸附特性.考察吸附剂投加量、溶液初始pH、吸附时间和溶液初始浓度等对吸附的影响,在此基础上拟合分析吸附动力学和吸附等温线.结果表明:吸附36h达到平衡,块状花生壳对Cd2+和Pb2+的吸附均符合准二级动力学模型和Langmuir吸附等温线模型.在25℃,Cd2+和Pb2+的初始浓度为100mg/L时,块状花生壳对二者的吸附量分别可达到10.47mg/g和17.37mg/g.
Influence of adsorbent quantity,initial solution pH,adsorption time and the ini- tial concentration of solution on adsorption were investigated to infer the adsorption characters of Cd2＋and Pb2＋on peanut shell. Furthermore, the adsorption kinetic and isothermal curve were fit- ted. The results indicated that the adsorption reached equilibrium after 36 h. The adsorption ki- netic and isothermal datas of Cd2＋ and Pb2＋ both well fittedpseudo-second-order kinetic model and the Langmuir isotherm adsorption model respectively. When the initial concentration of adsorbate solution was about 100 mg/L, the adsorption capacity of the peanut shell to Cd2＋ and Pb2＋ were10. 47mg/g and 17.37 mg/g under the condition at 25 ℃ respectively.
出处
《太原师范学院学报（自然科学版）》
2015年第1期92-96,共5页
Journal of Taiyuan Normal University:Natural Science Edition
基金
国家自然科学基金面上项目(41073088)
国家水体污染控制与治理科技重大专项(2009ZX07211001)
